Testing tool for determining the boresight retention of weapons brackets and night vision sights

ABSTRACT

A testing tool that includes a light weight, highly accurate telescope and supplemental weights used to duplicate the weights of various night vision sights. The testing tool is mounted on a weapons adapter bracket for testing the accuracy of either or both the sight and the bracket. The supplemental weights include a main body block and auxiliary side weights in which the auxiliary side weights are bolted traversely through the main body block. The telescope is connected to one side of the main body block. The side of the main body block opposite the telescope is bottomed out on the bottom and beveled edges of a rectangular channel in a weapons adapter bracket. The weapons adapter bracket is connected to a weapon.

United States Patent Collins Oct. 9, 1973 TESTING TOOL FOR DETERMININGTHE Robert H. Collins, Alexandria, Va.

The United States of America as represented by the Secretary of theArmy, Washington, DC.

Filed: June 12, 1972 Appl. No.: 261,857

Inventor:

Assignee:

3,555,687 2/1970 Joseph 33/245 Primary Examiner-Ronald L. WibertAssistant Examiner-S. K. Morrison Attorney-Harry M. Saragovitz et a1.

[57] ABSTRACT A testing tool that includes a light weight, highlyaccurate telescope and supplemental weights used to duplicate theweights of various night vision sights. The testing tool is mounted on aweapons adapter bracket for testing the accuracy of either or both thesight and the bracket. The supplemental weights include a main bodyblock and auxiliary side weights in which the auxiliary side weights arebolted traversely through the main body block. The telescope isconnected to one side of the main body block. The side of the main bodyblock opposite the telescope is bottomed out on the bottom and bevelededges of a rectangular channel in a weapons adapter bracket. The weaponsadapter bracket is connected to a weapon.

5 Claims, 5 Drawing Figures Jill 1| llllllll PATENIEB 9W3 3.764.219

sum 10F 2 FIG. 1

TESTING TOOL FOR DETERMINING THE BORESIGHT RETENTION OF WEAPONS BRACKETSAND NIGHT VISION SIGHTS The invention described herein may bemanufactured, used, and licensed by or for the Government forgovernmental purposes without the payment to me of any royalty thereon.

BACKGROUND OF THE INVENTION When firing military weapons, such as riflesor machine guns, using a night vision sight mounted thereon, many timeseither the night vision sight or the weapons adapter bracket upon whichthe sight is connected to the weapon, become misaligned. It is ofessence that misalignment problems occuring in the field be corrected inthe 'field, possibly at the division maintenance level rather than forthe weapon to be sent back to some rear area. The testing tool of thepresent invention may be easily transported along with the weapons tofacilitate quick, accuracy tests.

SUMMARY OF THE INVENTION The testing tool of the present inventioncomprises a small telescope and supplemental weights with thesupplemental weights including a main body weight and auxiliary sideweights. The telescope is mounted on one side of the main body weightwith the opposite side of the main body weight mating with a weaponsadapter bracket connected to the weapon. The telescope is screw mountedto the main body weight. The combined telescope and main body weight arealso screw connected to the bottom of a beveled rectangular chanelportion of the weapons adapter bracket. The side of the main body weightin contact with the rectangular channel portion of weapons adapterbracket is beveled for mating with the channel of the weapons adapterbracket. The beveled fittings prevent lateral motion of the telescope.

When required to simulate the exact weight of the night vision sightunder test, auxiliary side weights are bolted traversely through themain body weight.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates the telescope andsupplemental weights of the present invention as they are mountedtogether;

FIG. 2 shows the supplemental weights and telescope mounting bracket andrings;

FIG. 3 illustrates another view of the main body weight;

FIG. 4 shows a weapon adapter bracket mounted on a weapon; and

FIG. 5 shows a detailed view of the supplemental weights, the telescopemounting bracket, and the weapons adapter bracket.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1,the telescope and a portion of the supplemental weights are shown. Otherdrawings in this disclosure show the complete assemblage of the weightsand how they are attached to telescope 10 and to the weapon. Telescope10 is a Redfield 3X-9X variable slope l-inch tube diameter. Thistelescope is light weight and is highly accurate. However, other lightweight, highly accurate telescopes may be used. Main body block 12 andone auxiliary weight 14 are shown in FIG. 1. Another auxiliary weight(not shown) is positioned on the opposite side of main body block 12from auxiliary weight 14. Block 12 and the auxiliary weights may be madeof steel.

FIG. 2 illustrates the supplemental weights and the telescope mountingattachments. Auxiliary side weight 18 has two bolts 28 for passingthrough holes 30 in main body block 12 and holes 30 in auxiliary sideweight 14. Wing nuts 16 are threadably attached to the ends of bolts 28for securing auxiliary weights l4 and 18 to the main body block 12.After weights l4 and 18 are attached, telescope mounting bracket 35 isattached to main body block 12. Bracket 35 may be a modified RedfieldWIN-400 steel base mount. Bracket 35 is modified by cutting an elongatedslot through the entire length of the side adjacent main body block 12 Vsuch that the two sides fit tightly together. Bracket 35 is attached toblock 12 by screws 34 passing through holes 38 in mounting bracket 35and are threadably connected to threaded holes 39 of block 12. Bracket35 is mounted on block 12 with opening 36 in the forwardmost position ofthe weapon. Prior to mounting telescope 10 on bracket 35, rings 40 and42 are mounted on the telescope. Rings 40 and 42 are shown in FIG. 2 astwo half rings connected together by screw means. Rings 40 and 42 arecommercially available. For example, Redfield produces typical rings formounting the Redfield 3X-9X variable slope l-inch tube diametertelescope. Ring 40 is mounted on telescope 10 in the forwardmostposition such that flattened head 44 on ring 40 sets down in opening 36with the telescope turned at a right angle to bracket 35. The telescopeis then turned so that the wings of head 44 are locked down withinopening 36 and the telescope is aligned in the operating position. Thetelescope is then secured to bracket 35 by screws 13 threadablyconnected to bracket 35. Each of screws 13 has a recessed portion 13anext to its stem 13b that forms an extended edge 13c around the screw.Edge 13c fits over a circular arc milled out portion on the bottom edgeof each side of ring 42. The milled out portion forms a projected edge42a that fits into sunken portion 13a when screw 13 is tightly securedto bracket 35.

FIG. 3 illustrates the main body block 12 shown without any attachmentsthereto. Beveled edges 50 (one which is not shown in FIG. 3) will beexplained later in this disclosure. Lower portion 24 of block 12 hasthreaded holes 33 on its bottom surface and long beveled sections 22 ateach end. The utility of the beveled edges 50, beveled sections 22, andthreaded holes 33 will be explained later.

In FIG. 4, the weapons adapter bracket 43 is shown mounted on a handrifle weapon 46. Bracket 43 is attached to rifle 46 by attaching screw45. Bracket 43 includes an open elongated channel formed by sides 44.FIG. 5 shows a much better illustration of bracket 43. The channel has aflat bottom 50b with beveled edges 50a on each side bottom 50b and sides44. The night vision sight being tested also fits down in the channeland is attached to bracket 43 by about three screws 48 (only one beingshown in FIG. 5). Screws 48 are threadably connected to the night visionsight by threaded holes in the bottom of the sight. When telescope 10and the supplemental weights of the present invention are placed in thechannel for testing boresight alignment of a typical weapon such as 46the main body block 12 has threaded holes 33 therein for ac- Oct. 9,1973 STERUNG 3,764,272

APPARATUS FOR PRODUCING FINE POWDER BY PLASMA SUBLIMATION Filed March17, 1971 3 Sheets-Sheet 1 \lllllll FIG.1.

Inventor HfiNLEY F. STERl/NG Attorney

1. A boresight retention testing tool for testing alignment of nightvision sights and weapons adapter brackets that are mounted on a weapon,the test tool comprising in combination: a light weight, highly accuratetelescope; a main body block adapted for attachment to said weaponsadapter bracket on one side and adapted for accepting said telescope onthe side opposite said weapons adapter bracket; and a plurality ofauxiliary side weights adapted for attachment to said main body block ina traverse direction in which the main body block and auxiliary sideweights are used to duplicate the weights of the night vision scope suchthat when the weapon is test fired with the test tool thereon theloading on the weapon is the same as the loading caused bY the nightvision scope.
 2. A testing tool as set forth in claim 1 wherein the mainbody block is made of steel.
 3. A testing tool as set forth in claim 2wherein said main body block is adapted for attachment to said weaponsadapter bracket by having a lower section of the main body block fitinto a rectangular channel of said weapons adapter bracket wherein saidlower section and the bottom of said rectangular channel have bevelededges that fit snugly together and wherein the main body block and saidweapons adapter bracket are further attached together by screws.
 4. Atesting tool as set forth in claim 3 wherein said main body block andsaid telescope are adapted for attachment to each other by a mountingbracket milled out to fit over the top of said main body block and isscrew threadably attached thereto in which said telescope is attached tosaid mounting bracket.
 5. A testing tool as set forth in claim 4 whereinsaid telescope is attached to said mounting bracket by attachment meansinterconnecting two rings encircling said telescope with one of saidrings having a flattened head thereon that fits into a slot of saidmounting bracket when the telescope is turned 90* to said mountingbracket and is tightly secured to said mounting bracket when saidtelescope is aligned with said mounting bracket, the other of said ringshaving a recessed portion on each side aligned with threadable holes insaid mounting bracket wherein screws with recessed portions next totheir stems are threadably connected to said threadable holes forfurther securing said telescope to said mounting bracket.